Mini Valve Spring Tester - 0-700lbs.

The Mini Valve Spring Tester – 0-700lbs from PROFORM is an essential diagnostic tool for any serious engine builder, performance mechanic, or enthusiast working on valve spring assembly and validation. Valve spring pressure directly impacts engine performance, reliability, and longevity—too weak and you risk valve float at high RPM; too strong and you accelerate wear on cam lobes and rocker arms.

This compact tester allows you to verify valve spring load before installation, eliminating guesswork and preventing costly failures after teardown and reassembly. Built for precision and durability, the Mini Valve Spring Tester measures valve spring tension across a 0–700 lbs range, covering stock and performance applications in small-block and mid-sized engines. The calibrated gauge reads directly in pounds, and the compact footprint (5.1 x 2.8 x 11.3 inches) fits easily on any workbench or engine stand.

Professionals and dedicated DIY builders rely on this tester when preparing heads for cam swaps or performance builds where valve spring load consistency is critical. Whether you're validating a new spring set before installation or diagnosing performance issues after extended use, this tool is designed to ensure optimal engine performance.